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| author | Jason Wessel <jason.wessel@windriver.com> | 2008-08-01 08:39:34 -0500 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2008-08-01 08:39:34 -0500 |
| commit | 5f5ddfb3605d2a4f555a7ff034859e623eafcd27 (patch) | |
| tree | f3a79d9f0ba631ed8d5e10560ab6cca2debe2f65 | |
| parent | 94ad374a0751f40d25e22e036c37f7263569d24c (diff) | |
| download | linux-5f5ddfb3605d2a4f555a7ff034859e623eafcd27.tar.gz linux-5f5ddfb3605d2a4f555a7ff034859e623eafcd27.tar.bz2 linux-5f5ddfb3605d2a4f555a7ff034859e623eafcd27.zip | |
kgdb: remove the requirement for CONFIG_FRAME_POINTER
There is no technical reason that the kgdb core requires frame
pointers. It is up to the end user of KGDB to decide if they need
them or not.
[ anemo@mba.ocn.ne.jp: removed frame pointers on mips ]
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
| -rw-r--r-- | Documentation/DocBook/kgdb.tmpl | 8 | ||||
| -rw-r--r-- | lib/Kconfig.kgdb | 11 |
2 files changed, 15 insertions, 4 deletions
diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl index e8acd1f03456..54d3b158d080 100644 --- a/Documentation/DocBook/kgdb.tmpl +++ b/Documentation/DocBook/kgdb.tmpl @@ -98,6 +98,14 @@ "Kernel debugging" select "KGDB: kernel debugging with remote gdb". </para> <para> + It is advised, but not required that you turn on the + CONFIG_FRAME_POINTER kernel option. This option inserts code to + into the compiled executable which saves the frame information in + registers or on the stack at different points which will allow a + debugger such as gdb to more accurately construct stack back traces + while debugging the kernel. + </para> + <para> Next you should choose one of more I/O drivers to interconnect debugging host and debugged target. Early boot debugging requires a KGDB I/O driver that supports early debugging and the driver must be diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb index 2cfd2721f7ed..9b5d1d7f2ef7 100644 --- a/lib/Kconfig.kgdb +++ b/lib/Kconfig.kgdb @@ -4,14 +4,17 @@ config HAVE_ARCH_KGDB menuconfig KGDB bool "KGDB: kernel debugging with remote gdb" - select FRAME_POINTER depends on HAVE_ARCH_KGDB depends on DEBUG_KERNEL && EXPERIMENTAL help If you say Y here, it will be possible to remotely debug the - kernel using gdb. Documentation of kernel debugger is available - at http://kgdb.sourceforge.net as well as in DocBook form - in Documentation/DocBook/. If unsure, say N. + kernel using gdb. It is recommended but not required, that + you also turn on the kernel config option + CONFIG_FRAME_POINTER to aid in producing more reliable stack + backtraces in the external debugger. Documentation of + kernel debugger is available at http://kgdb.sourceforge.net + as well as in DocBook form in Documentation/DocBook/. If + unsure, say N. if KGDB |